Vault 110
Cape Hatteras Destroyed
General Information
Location:Vault 110

Vault 110 is a Vault-Tec vault located underneath the ruins of the Cape Hatteras lighthouse in Buxton, North Carolina. The only vault in the Broken Banks area, Vault 110 resides in the intertidal zone of Hatteras Island. The vault remains unopened due to the high population of Mirelurks and the constant danger of flooding should the doors be opened during high tide. This was intended in its design; Vault-Tec's experiment was to subject people to the constant maintenance required to keep a sinking vault in working order.


Construction and Purpose

In 2042, Cape Hatteras lighthouse was sold to Carolina Coastal Real Estate for less than a million dollars. This company was absorbed by Vault-Tec in 2153. There were a number of proposed sites for the Vault, though Cape Hatteras was eventually chosen as the site of Vault 110 in order to stimulate the failing Outer Banks economy. The construction of Vault 110 began in 2060. Supports for the lighthouse were constructed so the lighthouse did not cave in. The Vault, however, was built in such a way that, over time, it would start sinking as erosion took place. The purpose of the Vault was to observe the reactions of Vault inhabitants to a sinking Vault that was constantly exposed to salt water and erosion.

Vault 110 was given a GECK. Upon delivery, the GECK was found to be faulty and unusable.


In their free time, Vault residents were able to enjoy various activities, including a game night every Friday, videos, and bake offs. There was also a salt water taffy production facility in the bowels of the Vault.

Early Years

When the bombs fell, the residents of coastal Carolina flocked to Vault 110. Being on an island, it took some time for residents to arrive. Vault 110 was one of the last vaults to seal its doors at midnight, October 24, 2077. Overseer Jenna Traves was its first overseer. Her tenure went well until 2097. She tried opening the Vault, which resulted in the engineering deck being flooded to knee height before she closed the Vault seemingly forever. The salt water eventually shorted the GECK. She passed away in 2113 to natural causes. As more overseers assumed their roles, it became evident that the Vault was slowly sinking.

As the years went on and the Vault became more damaged by corrosion, residents continued to attempt to repair it. While some were successful, some areas became irreversibly sunken. By 2200, many residence halls and gathering places were condemned and abandoned. As time went on, the denizens of the vault considered opening the vault, hoping to escape the tedious task of repairing the constantly corroding vault. However, the risk of flooding the vault was simply too great.

Later Years

In 2273, several mirelurks tunneled their way into the Vault, accessing a corroded, condemned room. The overseer sent a team to investigate the noise. Security opened the room only to be swarmed by mirelurks. Furthermore, water began leaking into the Vault from the access hole, though sediment soon plugged the hole. The mirelurks killed several people before being put down by Vault Security. For the next few years, mirelurks began breaking into the Vault, though it was never as bad as the 2278 attack.

In June 2278, Mirelurks dug a nest into the men's restroom of the Vault. Additionally, water poured from the new access point. The Mirelurks charged into the atrium, but the first wave was put down. However, the flooding Vault threatened the population. Another Mirelurk attack was put down a few days later. It became obvious the Vault was no longer safe. Therefore, Overseer Ralph Chalmers ordered the evacuation of the Vault. He opened the Vault at low tide. As the Vault door opened, horrified denizens watched as the half-flooded entrance room opened to reveal a nest crawling with Mirelurks.

The Mirelurks quickly swarmed the room and devoured the denizens. Their tattletale clicks echoed through the Vault. With the Vault flooding and Mirelurk invading, Chalmers ordered the evacuation of the Vault. To save his people, he activated the faulty GECK, which killed all the Mirelurks in the process. Chalmers himself was transformed by the GECK.


Vault 110 is a Mirelurk breeding ground. Chalmers' consciousness and those of the Mirelurks became part of the Geckaheydron – a superintelligent hivemind dedicated to assimilating what it can. The Vault itself is falling apart. Sea life adorns the walls while Mirelurks and Centisharks traverse its halls. Part of the Geckaheydron lives in the Vault's atrium.


The Vault was divided into four levels; maintenance, living quarters, work stations, and recreation areas.


The maintenance wing includes the heavy Vault door to the flooded caves of Vault 110. It also includes the water chip, reactor, pip-boy programming, workshops, laundry room, incinerator, and computer wing. The maintenance wing is almost always underwater whike every surface is covered by mirelurk eggs.

Living Quarters

The living quarters of the Vault contained the various residential rooms for the vault dwellers. These include single and family units. There are also several kitchens in the residential area along with washrooms. Since the depopulation of the Vault, several rooms are abandoned and are being used as storage areas. Furthermore, there are several sunken rooms that have been condemned. These areas are eerily empty. The sounds of nearby Mirelurks can be heard frequently.

Work Stations

The work stations contain several areas for work. It included the classrooms, the clinic, an automated PippyCola plant, and a salt-water taffy production facility. These areas are infested by Mirelurks and, in the case of the bottling plant, Pippylurks.

Recreation Areas

The recreation areas included the various gathering rooms, an arcade, diners, and a cigar lounge. The denizens of the vault gatheres here for enjoyment. Game nights occur here every Friday in the lounge between the Mirelurk Kings. Why they still do this beyond anyone's wildest theory.